Keeping on top of tax deadlines is one of the simplest ways to avoid unnecessary penalties, interest charges and last-minute stress.
To help you stay organised our Accountants247 team has pulled together some of the key UK tax dates for the coming year that small business owners, sole traders, landlords and employers should keep in mind.
July 2026
6 July 2026
Deadline for employers to submit P11D and P11D(b) forms for employee benefits and expenses.
31 July 2026
Second Self Assessment Payment on Account due for many taxpayers.
October 2026
5 October 2026
Deadline to register for Self Assessment if you need to file a tax return for the first time.
31 October 2026
Paper Self Assessment tax return deadline for the 2025/26 tax year.
December 2026
30 December 2026
Online Self Assessment deadline if you want HMRC to collect tax owed through your PAYE tax code (if eligible).
January 2027
31 January 2027
One of the biggest dates in the tax calendar:
- Online Self Assessment tax return deadline
- Payment of any tax owed for 2025/26
- First Payment on Account for 2026/27
Missing this deadline can lead to penalties and interest.
Monthly Dates to Remember:
19th / 22nd of each month
PAYE and National Insurance payments due to HMRC (depending on payment method).
VAT Deadlines
Usually due 1 month and 7 days after the end of your VAT quarter.
Tax deadlines can come around quickly, especially when you’re focused on running your business. Planning ahead now can help avoid rushed paperwork and unexpected bills later in the year.
If you’d like help staying on top of your deadlines, bookkeeping, payroll,or tax returns, get in touch with our friendly North West based team today.